الأسبوع السابع

Measures of Central Tendency (Measures of Position) )  مقاييس النزعة المركزية (مقاييس الموضع
1- Introduction
It’s a numerical measures used to measure the data
concentrate position or cluster. In general the data is
tend to be concentrated around a particular values.

The pins of a 8085 microprocessor can be classified into seven 
groups. 
1.Address bus 
A15 – A8 at pin no. 28 to pin no. 21, it carries the most significant 8-
bits of memory and I/O address. The microprocessor can address 
directly 65536 memory locations or 64k memory locations using 16- 
address lines (A15-A0). Pin no. 28 to pin no. 21 give us the higher 
order 8-bits of the address (A15-A8). 
AD7–AD0 at pin no. 19 to pin no. 12 are used for dual purpose. It is 

Rotation of Axes

Lecture-5  
Characteristics of Memory:  
In the broad sense, a microcomputer memory system can be logically 
divided into three groups:  
1) Processor memory  
2) Primary or main memory  
3) Secondary memory  
• Processor memory refers to a set of internal registers. These registers hold 
temporary results when computation is in progress.  
• Primary memory or the main memory is the internal memory to store both 
program and data. The processor can access these memories directly.